Hypochlorous acid/alkali metal hydoxide-containing products, methods and equipment for removing stains from fabrics

a technology of hypochlorite and metal hydoxide, which is applied in the direction of detergent compounding agents, inorganic non-surface active detergent compositions, dry-cleaning apparatuses for textiles, etc., can solve the problems of a composition of blood and endometrial cells, and the inability to remove menstrual fluid from cotton panties, so as to reduce the damaging effect of hypochlorite-containing solutions on soft fabrics

Inactive Publication Date: 2009-09-01
TAYLOR LAWNIE H
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0006]One object of the present invention is to provide cleaning products and methods for reducing the damaging effect of hypochlorite-containing solutions on soft fabrics. The fabrics can be made of cotton, cotton / polyester, or other materials. The fabrics may be, for example, in white.
[0019]The stain to be removed can be menstrual fluid or underarm perspiration stain. The contact between the cleaning composition and the stain can last at least five, fifteen, thirty minutes, or longer, with no damage to the soft fabric article.

Problems solved by technology

Menstrual fluid, a composition of blood and endometrial cells, is difficult to remove from cotton panties once it has stained the fabric.
Moreover, even after lengthy soaking, a dark residue stain may still remain on the cotton fabric, even with scrubbing.
Vigorous scrubbing accelerates deterioration of the bleach-weakened cotton fibers which, again, leads to damaged panties, and expense and frustration.
Perspiration stain in the underarm areas of white cotton fabric shirts and blouses is also difficult to remove, even for professionals in the garment laundry and cleaner business.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example i

Comparison of Scrubbing Bubbles Mildew Stain Remover®, Tilex Mildew Remover®, Lysol Mildew Remover® and Scrub Free Mildew Stain Remover® to Clorox Bleach for the Removal of Menstrual Fluid Stains and Underarm Perspiration Stains

[0050]Tests reported below show that white cotton fibers have a greater tolerance for Scrubbing Bubbles Mildew Stain Remover®, Tilex Mildew Remover® and Lysol Mildew Remover® than for bleaching products like Clorox® Bleach. In addition, the spray application and rapid removal of menstrual fluid stain and underarm perspiration stain associated with Scrubbing Bubbles Mildew Stain Remover®, Tilex Mildew Remover®, Lysol Mildew Remover® and Scrub Free Mildew Stain Remover®, versus the long immersed soaking process typical of products currently being used for the same purpose, indicate that the mildew removers can be used with greater safety on white cotton fabric.

[0051]Observed was the experimental testing of five common household products; (a) dilute Clorox® Blea...

example ii

Comparison of Clorox Bleach to a Cleaning Composition Comprising 2.4 wt % Sodium Hypochlorite and 1.25% Sodium Hydroxide

[0057]Two similar patches (approximately 2.5×2.5 cm2) of 100% cotton fabric were cut from the crotch of a new panty. The first patch was immersed in a diluted Clorox® Bleach solution. The diluted Clorox® Bleach solution contained about 2.4 wt % sodium hypochlorite. After six hours of soaking, the first patch showed signs of shredding. After ten hours of soaking, the first patch shredded completely. In comparison, the second patch was immersed in a solution which contains about 2.4 wt % sodium hypochlorite and 1.25 wt % sodium hydroxide. After ten hours of soaking, no effect of shredding was observed.

[0058]A test similar to those described in EXAMPLE I was conducted for the solution that contains 2.4 wt % sodium hypochlorite and 1.25 wt % sodium hydroxide. The solution was placed in an opaque spray container and used in exactly the same manner for cleaning panties o...

example iii

The Damage Effects of Hypochlorite Solutions to Cotton Patches and the Reduction Thereof

[0059]Cotton patches which were resistant to hand-tearing were soaked in different bleach solutions until damages have begun to occur as evidenced by weakening of the fabric such that it can be torn by hands with moderate forces. For each bleach solution to be tested, multiple cotton patches were used. Each patch was inserted into a vial containing the bleaching solution. The patch was removed periodically from the vial to determine the extent of damage by manually administering a tearing action. TC(D) was the cumulative time of soaking before the patch became hand-tearable.

[0060]The bleach solutions were modified from Ultra Clorox® Bleach which contains about 6% NaOCl and less than 0.2% NaOH. Additional NaOH in dry form was added to Ultra Clorox® Bleach to increase the concentration of NaOH. As Table 1 shows, Ultra Clorox® Bleach damages cotton fabrics in an accumulated time of approximately one...

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Abstract

Methodologies and equipment for preparing a hypochlorite solution bleach consumer product to remove menstrual fluid, underarm perspiration or other hard-to-remove stains from soft fabric articles with reduced damage to the fabric articles when compared with popular chlorine bleaches. The soft fabric articles preferably are in white, although the present invention can also be applied to articles in other colors. In one embodiment, the weight concentration ratio of the alkali metal hydroxide over the hypochlorite salt in the hypochlorite admixture solution is no less than 1:12.5. The hypochlorite admixture solution may contain at least 0.2% by weight of sodium hydroxide and / or have a pH of at least 11.8.

Description

RELATED U.S. APPLICATION DATA[0001]This application is a continuation of U.S. patent application Ser. No. 11 / 505,445, filed Aug. 17, 2006, which is a continuation of U.S. patent application Ser. No. 10 / 612,016, filed Jul. 3, 2003, now U.S. Pat. No. 7,109,157, which, in turn, is a continuation-in-part of U.S. patent application Ser. No. 10 / 373,787, filed Feb. 27, 2003, now U.S. Pat. No. 6,946,435, which claims the benefit of U.S. Provisional Application No. 60 / 423,978, filed Nov. 6, 2002, all of which are incorporated herein by reference in their entireties.TECHNICAL FIELD OF THE INVENTION[0002]This invention relates to products, methods and kits useful for removing stains, such as menstrual fluid or underarm perspiration stains, from clothes and other soft fabric articles. This invention also relates to methods for reducing the damaging effect of hypochlorite-containing solution on cotton and other soft fabrics.BACKGROUND OF THE INVENTION[0003]Menstrual fluid, a composition of blood...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): C11D3/395C11D7/06
CPCC11D3/3956C11D3/3947
Inventor TAYLOR, LAWNIE H.
Owner TAYLOR LAWNIE H
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